[meteorite-list] Friable meteorites

[pshugar at messengersfromthecosmos.com]

In a conversation with someone today, it was mentioned that
Kilabo was extremely friable. Another really friable
meteorite was Caracas, Peru.
My question is how do they survive to the ground, to be found
not as a dust, but in large pieces? How did they make a crator?
Have the scientists figured out how the Caracas meteorite made
such a large crator?
Many questions and so little time to figure out what happened.
Pete